ClassNotFoundException: com.lowagie.text.pdf.PdfGState

折腾报表导出，出现这个错误，  java.lang.ClassNotFoundException: com.lowagie.text.pdf.PdfGState

发现pom中引用了

		<dependency>
			<groupId>net.sf.jasperreports</groupId>
			<artifactId>jasperreports</artifactId>
			<version>6.16.0</version>
		</dependency>  
		
		<dependency>
		    <groupId>com.lowagie</groupId>
		    <artifactId>itext</artifactId>
		    <version>4.2.2</version>
		</dependency> 

添加

		<dependency>
		    <groupId>org.eclipse.birt.runtime.3_7_1</groupId>
		    <artifactId>com.lowagie.text</artifactId>
		    <version>2.1.7</version>
		</dependency>

后编译正常，可以正常导出pdf